Attachment for hand drills and the like



Jan. 5, 1960 I H. KLINGBEIL 9 ATTACHMENT FOR HAND DRILLS AND THE LIKE 7 Filed May 19, 1958 2 Sheets-Sheet 1 INVENTUR ziemwmua wmgxmlx ATTURNEY Jan. 5, 1960 H. KLlNGBElL 2,919,609

ATTACHMENT FOR HAND DRILLS AND THE LIKE Filed May 19, 1958 2 Sheets-Sheet 2 l N V E N T U H HERMANN KUNGBEJL A T T D R N E Y United States Patent ATTACHlVIENT FOR HAND DRILLS AND THE LIKE Hermann Klingbeil, Edmonton, Alberta, Canada Application May 19, 1958, Serial No. 736,377

2 Claims. (Cl. 77-7) In general, my invention is related to drills and, in particular, it is related to an attachment for hand drills wherein various drill instruments may be selected and placed in operation in the drill.

A general object of my invention, therefore, is to provide a multiple head attachment for a hand drill.

An additional object is to provide a multiple head attachment for a hand drill that may be used in conjunction with the hand drill without modification to the drill.

An additional object is to provide a multiple head attachment for use with hand drills that may be removed when not in use to allow the hand drill to be used in the conventional manner.

A further object is to provide a multiple head attachment for hand drills including novel means for manipulating the multiple head attachment while the drill is held in the hand of the operator.

A still further object is to provide a multiple head attachment for hand drills constructed from a minimum of low cost readily obtainable parts.

Additional objects of my invention will be seen when the attached specification is read in the light of the drawings. It should be understood however that the information disclosed in the description and drawings is by way of example and illustration only and should not be construed as a limitation.

In the drawings wherein a preferred embodiment is illustrated and wherein like numbers refer to like or similar parts:

Figure l is a side view showing a conventional hand drill and illustrating the mounting bracket for my device 'in dotted lines;

Figure 2 is a reverse view illustrating the rotatable head of my device;

Figure 3 is a projected view illustrating the mounting bracket, sliding member and head rotating mechanism of my device;

Figure 4 is a view illustrating a conventional hand drill with my device mounted thereon and ready for operation;

Figure 5 is a side elevational view partly in section illustrating one of the implement sockets with a drill bit fixed therein;

Figure 6 is a sectional end view of the mounting bracket;

Figure 7 is a projected view showing the chuck locking means.

With reference now to the drawings, there is shown a conventional hand drill referred to generally at 18 and comprising a pistol grip handle 24 at one end and a chuck 17 at its opposite end. An electric cord 25 extends through the handle 24 to connect to the electric motor inside the drill and a switch 26 may be pressed to start the internal motor and rotate the chuck 17. As is common, the chuck 17 includes jaws 27 which may be opened or closed by rotating the ring 28 with a chuck wrench seated in' one of the openings 23 in the chuck. Since this construction and operation is more or less common in devices of .t a enied Jan. 5, 1960 ice 2 this nature, further description of the hand drill operation is considered unnecessary.

My multiple drill attachment for the hand drill 18 comprises the bracket 1 positioned on the drill 18 as illustrated in Figure 4 in the drawings and is secured thereon by adjustment of the thumb screw 2 which engages with the case of the hand drill 18 to hold the bracket 1 securely in position. Additional screws 3 also engage with the case ofthe drill 18 and serve to level the bracket member with respect to thecase as well as to act as holding devices.

At its forward end the bracket 1 is formed with a longitudinal channel 29 which has tapered sides 30. Mounted slidably within the channel 29 is the sliding member 4 whose sides correspond tothe tapered sides 30 to hold the sliding member 4 in position in the channel 29, and in addition, the sliding member 4 is raised and bent angularly as indicated at 31 and is provided with the opening 9. The head 10 is formed with the arms 13 extending radially therefrom and, by the bolt 32 or like means, is mounted pivotally in the opening 9.

An implement socket referred to generally at 14, is mounted rotatably at the end of each arm 13 in the opening 35, and each socket includes the boss 33 and shank 16 'with the hole 34 drilled through the boss into the socket through the opening and the underside of the boss 33 is engaged on one side of the arm. A locking collar 36 is fitted over the shank 16 to engage on the underside of the arm 13 and the collar is locked on the shank 16 by the grub screw 37 or the like. It should be noted that the grub screw 37 extends through the shank 16 into the hole 34 and serves to engage on the shank of the drill bit 15 or like implement to secure the implement firmly in the hole.

To move the sliding member 4 within the channel 29 and to rotate the multiple head 10, I have provided the actuating arm 5 which is mounted rotatably on the member 4 through the slot 12 in the actuating arm and the pin 6 projecting from member 4. Obviously, the actuating arm 5 will be permitted longitudinal movement with respect to the member 4 within the limits of the slot 12 and, at the same time, will be permitted to rotate on the pin 6 as required. At its rearward end, the arm 5 is provided with the upturned portion 7 which may be pushed against by the thumb of the user when itis desired to rotate the arm. At its forward end, the arm 5 is provided with the teeth 8 in the form of a quadrant which are adapted to engage with the teeth on the gear 11 of the head 10. In addition, the arm 5 is formed with the indentation 38 on its one side which is positioned to engage with the pin 39 on the bracket 1 and lock the arm 5- in the retracted dis engaged position.

In ordinary operation, the arm 5 would be in the maximum retracted position under tension of the spring 26 and the teeth 8 would be disengaged from the gear 11. To rotate the head 10, it is necessary to rotate the arm 5 slightly to clear the pin 39 and to then move the arm forwardly along the slot 12 until the teeth 8 are engaged with the gear 11. Additional forward pressure is then exerted on the arm 5 to move the sliding member 4 forwardly and disengage the shaft 16 from the chuck 17. The arm 5 is then rotated on the pin 6 to rotate the head 10 and when another shank 16 is in position over the chuck 17, pressure on the arm 5 is released and action of the spring 26 will draw the arm 5 backwardly and the sliding member 4 backwardly until the shank 16 is engaged in the chuck. It should be noted that the shanks 16 are each formed preferably with a hexagonal surface 3 and, with the jaws of the chuck 17 correctly adjusted, the shank 16 will fit firmly into the chuck.

To prevent movement of the chuck to open the jaws once the shank 16 is installed therein, I have provided the locking collar I9 which'includes the prong 20 to engage in the teeth of the chuck ring 28 and with the depression 22 which seats in the opening 23 ofthe chuck to secure the ring 19'firmly on the chuck.

What I claim as my invention is:

1. A combination with a hand drill having a casing with a hand grip adjacent one end thereof and a chuck at the opposite end thereof of a multipledrill attachment comprising a bracket secured removably at the side of the hand drill, a member mounted onthe bracket for'longitudinal sliding movement therealong, ahead mounted rotatably at the forward end of the said member adjacent the said chuck, a plurality of arms extending from the head, an implement socket secured rotatably on each arm having a shank engageable with the chuck as the head is rotated and means for rotating the head.

2. In combination with a hand drill having a casing with a hand grip at one end thereof and a chuck at the opposite end thereof, a multiple drill attachment comprising a bracket secured removably at the side of the hand drill, a member mounted on the bracket for longitudinal sliding movement therealong, a head mounted rotatably at the forward end of the said member adjacent the said chuck, a gear wheel secured to the said head coaxial with the rotatable mounting thereof, a plurality of arms extending from the head, an implement socket secured rotatably on each arm and having a shank engageable with the chuck, an actuating arm mounted rotatably on the sliding member, a quadrant at one end of the arm engageable with the said gear'and an actuating handle at the other end of the said arm.

References Cited in the file of this patent UNITED STATES PATENTS Luna Dec. 1, 1942 Herman Apr. 12,1949 Carter et a1 June 1, 1954 

